High speed communications system for analog subscriber connectio

Details High speed communications system for analog subscriber connectio High speed communications system for analog subscriber connectio

1997-02-20

1999-01-12

Bocure, Tesfaldet

Pulse or digital communications

Pulse code modulation

375285, 370523, H04B 1404

Patent

active

058598723

ABSTRACT:
A method of detecting the presence of robbed-bit signaling within the digital portion of a telephone network. A communication system includes an encoder and a decoder. The encoder has a digital connection to the digital portion of the telephone network. The digital portion of the telephone network is connected by an analog loop to the decoder. The method includes sending a predetermined pattern of PCM codewords from the encoder, through the telephone network, to the decoder. An error measurement is taken at the decoder. The presence of robbed-bit signaling is determined based upon the error measurement.

REFERENCES:
patent: 4730312 (1988-03-01), Johnson et al.
patent: 4794604 (1988-12-01), Gorshe
patent: 4926355 (1990-05-01), Boreland
patent: 5533121 (1996-07-01), Suzuki et al.
patent: 5710790 (1998-01-01), Herzberg et al.
patent: 5729229 (1998-03-01), Betts et al.
patent: 5761247 (1998-06-01), Betts et al.

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